“Try and find the same vaccine, the same mRNA vaccine — but if you can’t, for some reason, then consider them interchangeable,” Dr. Theresa Tam, Canada’s chief public health officer, told a news briefing. “This advice provides provinces and territories with safe and effective options to manage the vaccine programs.”
After a slow start, Canada has been vaccinating nearly 1% of its population each day, on average, for the past few weeks.
Supply remains an issue, however, with the Moderna and AstraZeneca vaccines.
The advisory committee says Canadians who received a first dose of an mRNA vaccine, either Pfizer or Moderna, can receive the other mRNA vaccine for their second dose if the same mRNA vaccine “is not readily available.”
“NACI has worked to quickly adapt this guidance on the use of Covid-19 vaccines in Canada to ensure optimal protection of Canadians at pace with the ever-changing circumstances during this pandemic,” said Tam.
According to Canadian data, as of the last week of May, 13 million Canadians had received at least one dose of the Pfizer vaccine, while 3.5 million had received the Moderna vaccine and nearly 2 million had received the AstraZeneca vaccine.